From 67a3672c001879eda60de804c890764bb5da09bd Mon Sep 17 00:00:00 2001
From: Jonathan Bauer
Date: Thu, 6 Jun 2013 15:37:46 +0200
Subject: [rootfs-stage31] add debug in the kernel command line: use with
 'debug=<level>' where level can be 1 (before switch_root), 2 (after aufs), 3
 (after squashfs/nfs, before aufs), 4 (before network)

---
 remote/rootfs/rootfs-stage31/data/init | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'remote')

diff --git a/remote/rootfs/rootfs-stage31/data/init b/remote/rootfs/rootfs-stage31/data/init
index ee90cf15..bf11d9aa 100755
--- a/remote/rootfs/rootfs-stage31/data/init
+++ b/remote/rootfs/rootfs-stage31/data/init
@@ -15,7 +15,7 @@
 # debug shell
 drop_shell() {
 	[ $# -gt 0 ] && echo $@
-	echo "Dropping debug shell. CTRL + D will continue booting."
+	echo "CTRL + D will continue booting."
 	setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
 }
 
@@ -49,8 +49,8 @@ read KCL < /proc/cmdline
 export KCL
 for opts in ${KCL}; do
 	case ${opts} in
-		debug*)
-			DEBUG=1 ;;
+		debug=*)
+			DEBUG=${opts#debug=} ;;
 		splash*)
 			SPLASH=1 ;;
 		ip=*)
@@ -79,6 +79,8 @@ fi
 mkdir -p /dev/shm/union /dev/shm/uniontmp /rorootfs
 mount -n -t tmpfs none /dev/shm/uniontmp
 
+[ $DEBUG -ge 4 ] && drop_shell "Requested Debug Shell (before network)."
+
 echo "Setup networking..." # Source script so the variables are still available to us
 . "/bin/setup_network" || echo "Error setting up network"
 
@@ -93,7 +95,7 @@ else
 	mount -t squashfs /mnt/*.sqfs /rorootfs || drop_shell "Problem mounting Squashfs."
 fi
 			
-[ $DEBUG -ge 1 ] && drop_shell "Requested Debug Shell."
+[ $DEBUG -ge 3 ] && drop_shell "Requested Debug Shell: squashfs/nfs mounted, before aufs."
 
 echo "Building aufs..."
 mv /mnt/modprobing /dev/shm/uniontmp
@@ -102,6 +104,8 @@ mount -n -t aufs -o br:/dev/shm/uniontmp:/rorootfs=ro none /mnt || drop_shell "P
 mkdir -p /mnt/uniontmp /mnt/tmp
 mount -n --move /dev/shm/uniontmp /mnt/uniontmp || drop_shell "Problem moving uniontmp."
 
+[ $DEBUG -ge 2 ] && drop_shell "Requested Debug Shell: after aufs'ing."
+
 # create udev rule for nic we booted from
 cat > "/mnt/etc/udev/rules.d/70-net-boot-nic-name.rules" <<HEREEND
 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="$MAC", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
@@ -118,6 +122,8 @@ SLX_PXE_DNS='$DNS_SERVER'
 SLX_PXE_MAC='$BRIDGEMAC'
 HEREEND
 
+[ $DEBUG -ge 1 ] && drop_shell "Requested Debug Shell: before switch_root."
+
 for mnt in proc sys run ; do
   umount -n "$mnt"
 done
-- 
cgit v1.2.3-55-g7522